note chrestomanci <p>On unix, child processes inherit the environment from their parent, but any changes they make are not propagated back to the parent when the child quits.</p> <p>Your csh script works because it runs in the same process as your shell, so changes made in it remain after the script exits.</p> <p>The usual way to create a perl script that modifies the environment is to have it emit a shell script on stdout, and then eval the script's output. eg:</p> <c>eval `perl set_my_env.pl`</c> <p>The perl script just prints a series of <c>setenv NAME value</c> lines.</p> 966632 966632